Transcript for Kansas City Chiefs Player Jovan Belcher's Murder-Suicide

We'll tell you what geer advised coming up. We'll start with kansas city where linebacker jovan belcher. He killed his girlfriend on saturday. And then killed himself in front of his coach. Caught in the middle here the most innocent conceivable victim, the couple's 3-month-old girl. John? Reporter: Dan, good morning. We're right here on the field. This morning, we're learning more about what may have happened in the hours leading up to this tragedy. It all started 1:00 saturday morning when belcher's girlfriend got home late from a concert that she attended with friends. Tragically it ended seven hours later. He then drove to the chiefs stadium where he then took his own life. This morning, investigators are trying to figure out why linebacker jovan belcher killed his 22-year-old girlfriend and then took his own life. We heard that they had been arguing in the past. Reporter: Police say saturday morning he shot and killed kasandra perkins the mother of his daughter at their home. Police say belcher's own mother was in the house, saw the murder and called 911. He then jumped in his car and drove to arrowhead stadium to the team's practice facility. With a gun held to his head in the car he began talking to coaches. They were never in danger. They talked for a little bit. Reporter: Suddenly he walked away taking his own life as the chiefs head coach and the general manager witnessed in horror. The kansas city chiefs released a statement saying quote, the entire chiefs family is deeply saddened by today's events and our collective hearts are heavy with simpb thy, thoughts and prayers for the family and friends affected by this unthinkable tragedy. At just 25 years old, belcher seemed like he had the world in his powerful hands. As a starting linebacker he reported earned millions in the nfl, living the good life. Driving a bentley. He always seemed like a nice guy. Reporter: The question now, what caused the long island, new york, native to snap? No prior record of domestic abuse but had been on and off with his girlfriend for the past three years. Shocking. Shocking. The child has lost both parents. Reporter: The 3-month-old child is reportedly doing well, staying with belcher's mom the chiefs con summited with the nfl and decided to go ahead and play against the carolina panthers as scheduled. Many hoping this game will bring the community together. We'll turn now to round three of the nasty weather

This transcript has been automatically generated and may not be 100% accurate.